A/D conversion using a variable offset comparator
US6608582B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 2, 2002 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Jan 5, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/46
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An A/D conversion reference level is applied to an input of a variable offset comparator (i.e. VOC). A binary number that corresponds to the A/D conversion reference level is determined by changing a binary variable that is applied to vary the offset of the VOC until the VOC output changes states. The same procedure is applied to determine corresponding reference, binary numbers for all of the other A/D conversion reference levels. A successive approximation procedure (binary search) is then performed for a reference window in which an input analog level (to be converted into digital form) would fall, by successively applying the reference binary numbers to vary the VOC offset.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.